Reset Transmission Adapts

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

The Reset Transmission Adapts is a procedure for automatic transmissions in which the shift pressure learn values of each individual clutch is reset to zero or a base calibrated value, in the transmission control module (TCM).

Once the transmission adapts are set to zero or a calibrated value, the vehicle is then road test under various drive cycle events for the TCM to relearn shift pressure values for the best possible shift feel in all gear ranges.

The Reset Transmission Adapts procedure must be performed when one of the following repairs have been made to the transmission. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, DTCs being set, or customer dissatisfaction.

Transmission internal service, repair or overhaul
Valve body repair or replacement
Control solenoid valve assembly replacement
Any service/repair in response to a shift quality concern

Install any components or connectors that have been removed or replaced during diagnosis.
Perform any adjustments, programming or setup procedures that are required when a component or module is removed or replaced.
Clear the DTCs.
Ignition OFF, all vehicle systems OFF, this may take up to 2 minutes.

NOTE:

Do not cycle or turn the ignition switch OFF until directed to do so below.

Ignition ON, engine running, with a scan tool Reset Transmission Adapts.
Perform the Road Test .
Ignition OFF for 2 minutes.